U.S.-led coalition troops have killed eight Afghan civilians in an air strike in the western province of Farah during a raid against suspected militants, the U.S. military said.

The acknowledgement came as reports of more civilian deaths caused by a fresh air raid by foreign forces emerged on Thursday from the neighboring province of Herat.

The air strike on Tuesday was summoned after a coalition convoy came under sustained attack from machine gun and indirect fire from a number of houses adjacent to a road in the Bakwa district of Farah, the U.S. military said.

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“The coalition convoy returned fire and called for close air support on the enemy positions. A house was hit; eight civilians were killed, two others injured,” it said in a statement late on Wednesday.

“Coalition forces never intentionally target non-combatants, and deeply regret any occurrence such as this where civilians are killed and injured as a result of insurgent activity and actions,” it said.

Afghan officials said nine people, all members of the same family were killed in Tuesday’s bombing.